CATDOLL : CATDOLL: Will eels die if you buy them and put them in water? Are eels marine or freshwater fish?

1. Will the eel die if I buy it and put it in water? Is the eel a marine fish or a freshwater fish?

After you bring an eel home, it can usually survive for about 7 days, and then it may die due to poor water quality. When handling eels, you can first insert an ice pick into the eel's head, then use the back of a knife to hit the ice pick to fix it on the chopping board, then use a knife to cut the eel's belly from bottom to top, take out the internal organs, then use the knife to insert along the edge of the eel's spine to separate the body from the spine, and finally insert the knife into the gap between the eel's spine and the back to completely cut it off. After separating the bones and meat, you can wash the eel meat with clean water and use it as needed when cooking.

1. Will the eel die if I buy it and put it in water?

1. Survival time

Eels have high requirements for water quality. After you buy them home and put them in a bucket, they can generally survive for about 7 days, after which they may die due to poor water quality.

2. Treatment method

(1) Insert the ice pick into the eel’s head from one side and tap the ice pick with the back of a knife to secure it to the cutting board.

(2) Use a knife to cut along the eel’s belly from bottom to top, then take out the internal organs.

(3) Use a knife to insert along the edge of the eel's spine, separate its body from the spine, and then insert the knife into the gap between the eel's spine and back until the gap is completely cut.

(4) After the meat and bones are separated, soak and wash the eel meat in clean water and use it as needed when cooking.

2. Is eel a marine fish or a freshwater fish?

1. Eels are both marine fish and freshwater fish. They usually grow in freshwater rivers and migrate to the ocean to lay eggs when they mature. They can only lay eggs once in their lifetime and will die after laying eggs.

2. Eels are mainly distributed in the Yangtze River, Pearl River, Minjiang River and other water systems in my country, as well as in Hainan Island and some other rivers and lakes. Eels like to live in clean, unpolluted waters, and in order to adapt to the living environment, they will change their body shape at different stages.

3. Eels have six growth stages, namely the egg stage, leaf eel, glass eel, eel line, yellow eel and silver eel. Since they lay eggs in the ocean, it is impossible to directly obtain their eggs for hatching and breeding. Instead, they are caught by eel lines on the coast near the estuary and then sold to farmers for artificial breeding.

2. Can eels be raised indoors?

Eel fry cannot be bred artificially, mainly because the growth habits of eels are very special and difficult to simulate in an artificial environment. For example, Japanese eels grow up in freshwater rivers and begin to migrate to the sea in the summer, that is, swim from rivers to the ocean to lay eggs, which is exactly the opposite of the upstream migration of trout and salmon from the ocean back to the river to lay eggs. Its spawning ground is thousands of kilometers away in the deep sea between the Philippines and the Malay Islands.

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3. Many people do not understand conger eel farming technology. What are the key points of conger eel farming technology?

Conger eel belongs to the class of bony fish, order of Anguilliformes, family of Anguillidae. It is also called eel, yellow eel and red eel. It is a ferocious bottom fish. It lives in the sea area with muddy bottom or rocky reefs at a depth of 50-80m. It swims quickly and is voracious, eating shrimp, crab, fish, squid, etc. Conger eel meat is tender and fresh, and it is rich in nutrients. In addition to fresh sales and canning, its dried product "eel jerky" is sold well in domestic and foreign markets. Moreover, eel can be used as fish maw or to make glue. It is one of the main economic fish in my country's coastal areas. In recent years, conger eel farming has developed rapidly along the coast of Zhejiang Province and has achieved good economic benefits.

The pond for breeding conger eels is generally about 10-20 mu, with convenient water inlet and outlet, good water exchange conditions, and an average water level of more than 1.2m. The pond dam should be solid, firm, and without holes. The soil at the bottom of the pond should be soft to facilitate eels to burrow and live, but there should not be too much mud at the bottom of the pond, and it should not contain black rotten mud. Half a month before stocking, dry the pond and expose it to the sun or clean it with water, then sprinkle 75-100kg of dry lime per mu, or use 20-25kg of bleached poplar per mu, dilute it with water and sprinkle it on the bottom and side of the pond for disinfection. In addition, flat nets should be inserted in the gates of the pond inlet and outlet to prevent conger eels from escaping.

2. Selection and transportation of conger eels Keep the environment dark to reduce the activity of conger eels. During the entire transportation process, the operation should be careful and fast to minimize the exposure time of the conger eels and prevent the conger eels from secreting too much mucus.

Precautions for eel farming When the eel is first put into the pond, due to the difference between the environment in the pond and the environment in the sea area, the eel is very active, "nausea" and secretes mucus. To maintain fresh water quality within 1-2 days after entering the pond, the water change volume must be increased, and the daily water change rate is 100%. In the hot season, the water should be changed twice a day, and the daily water change rate should reach 80%. The daily water change rate is controlled at about 50%. In winter, the water temperature drops, and the fish burrows and does not eat. Generally, the water change rate is controlled at about 30%. The transparency of the pool water should be maintained at 30-50cm, and the pool water should be maintained above 1.2m in winter.

1. Disease prevention and control

During the breeding period, sterilization and deworming are carried out every 15 days. Biological agents and water quality improvers are used regularly. In addition, rhubarb and yellow are used twice a month.

Grind lotus, garlic and other Chinese herbal medicines and mix them with feed to feed the fish. This can effectively prevent and reduce the occurrence of diseases. 2. Rotational capture and release and wintering management

The technique of rotating catch and release is a production-increasing technique for eel farming, which is mainly based on the growth law of eels. By July, 50% of the eels have reached the standard size.

(0.4 jin/tail), in line with export requirements, catch once every month, stop feeding for 1 to 2 days before the rotation of catch.

Winter management is the bottleneck of eel farming in our area. The farm ensures the smooth wintering of eels by fattening them in autumn and increasing the water level.

As the water temperature gradually drops, while ensuring that the fish eat, increase the fat content in the feed until the water temperature drops to 10°C and stop feeding.

Keep it at about 2 meters, break the ice when the water surface is frozen and the keys are rotten to prevent freezing and ensure the survival rate.

1. Reasonable design of breeding ponds. The ponds for sea eel breeding are generally about 10-20 mu, with convenient water inlet and outlet, good water exchange conditions, an average water level of more than 1.2m, and the pond dam is required to be solid, firm and without holes.

2. Carry out feeding management. The bait for sea eel farming is generally fresh small dried hairtail, blue round, green catfish, etc. When fresh bait is scarce, frozen or dried small fish and shrimp can also be used. Rinse the bait before feeding.

3. Pond water management. When the eels are first put into the pond, due to the difference between the environment in the pond and the environment in the sea area, the eels are very active, "regurgitate" and secrete mucus. To maintain fresh water quality within 1 to 2 days after entering the pond, the amount of water change must be increased, and 100% of the water should be changed daily.

4. Pay attention to prevent fish diseases. In the process of sea eel farming, the most common disease is enteritis, which is mainly caused by poor water quality in high temperature seasons, feeding spoiled bait in the feast hole, and fish eating too much.

5. Carry out other related management of the rock report, such as patrolling the pond frequently and observing it frequently, patrolling the pond 1 to 2 times a day, and checking whether there are gaps or holes in the embankment, flat net, and gate.

The conditions for the breeding of sea eels are good drainage, soft soil, and not too much mud. The bait is generally fresh small hairtail, blue round, green catfish and other fresh fish, and the bait is thrown twice a day. It takes 1-2 days to keep the water fresh.

Before raising mullets, the excess silt should be dug out, the bottom of the pond should be leveled, and the pond, water inlet and outlet should be repaired. After 10-15 days, put them into the pond and disinfect them with 10-125 kg of quicklime per 1,000 square meters.